I like web programming and in future i would like to work at field that are relevant to this field
I would to develop a interesting,unique,one of its kind web site that would attract poeple to visit it and at the mean time gain information from it
JavaScript is a simple scripting language invented specifically for use in web browsers to make websites more dynamic. On its own, HTML is capable of outputting more-or-less static pages. Once you load them up your view doesn't change much until you click a link to go to a new page. Adding JavaScript to your code allows you to change how the document looks completely, from changing text, to changing colours, to changing the options available in a drop-down list (and much, much more!).
JavaScript is a client-side language, which means all the action occurs on the client's (reader's) side of things. This means that no trips to the server are required for JavaScripts to kick into operation, which would slow down the process enormously. JavaScript operations are usually performed instantaneously. In fact, JavaScript is often used to perform operations that would otherwise encumber the server, like form input validation. This distribution of work to the relatively quick client-side service speeds up the process.
JavaScripts are integrated into the browsing environment, which means they can get information about the browser and HTML page, and modify this information, thus changing how things are presented on your screen. This access to information gives JavaScript great power to modify the browsing experience. They can also react to events, such as when the user clicks their mouse, or points to a certain page element. This is also a very powerful ability.
Most importantly, JavaScript isn't overly tough to learn and use. It's a little technical, yes; but after just a few tutorials you'll have some useful scripts in your pages, and will have the knowledge necessary to modify and use the countless free scripts available across the web.